@charset "utf-8";
.portfolio {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    max-width: 1600px; 
    padding: 100px 40px 50px;
    margin: 0 auto;
    -webkit-transition: all .75s cubic-bezier(.77, 0, .175, 1);
            transition: all .75s cubic-bezier(.77, 0, .175, 1);
}

.portfolio li {
    position: relative;
    width: 33%;
    padding: 0.2%;
    overflow: hidden;
    list-style: none;
    box-sizing: border-box;    
    -webkit-transition: all .75s cubic-bezier(.77, 0, .175, 1);
            transition: all .75s cubic-bezier(.77, 0, .175, 1);
}

.portfolio li img {
    width: 100%; 
}

@media screen and (max-width: 1024px) {
    .portfolio  {
        padding: 70px 10px 0.6%;
    }
    .portfolio li {
        width: 50%;
        padding: 0.4%;
        overflow: hidden;
        list-style: none;
        box-sizing: border-box;    
    }
}

@media screen and (max-width: 768px) {
    .portfolio {
        padding: 60px 0 0.5%;
    }
    .portfolio li {
        width: 100%;
        padding: 0.5% 1%;
        overflow: hidden;
        list-style: none;
        box-sizing: border-box;    
    }
}